diff --git a/glances/plugins/glances_docker.py b/glances/plugins/glances_docker.py
index 62b04426..b05dc646 100644
--- a/glances/plugins/glances_docker.py
+++ b/glances/plugins/glances_docker.py
@@ -465,7 +465,9 @@ class Plugin(GlancesPlugin):
         ret = []
 
         # Only process if stats exist (and non null) and display plugin enable...
-        if not self.stats or len(self.stats['containers']) == 0 or self.is_disable():
+        if not self.stats \
+           or 'containers' not in self.stats or len(self.stats['containers']) == 0 \
+           or self.is_disable():
             return ret
 
         # Build the string message